5-Chloropyrazolo[1,5-a]pyrimidin-3-amine

Name: 5-Chloropyrazolo[1,5-a]pyrimidin-3-amine
Brand: ChemScene
Availability: InStock
Rating: 5 (1 reviews)

CAS No. 1234616-50-2
Cat. No. CS-0050512
Purity≥96%
MDL No.None

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Type	HazMat Fee
Excepted Quantity	$0.00
FedEx Limited Quantities Ground	$0.00
Hazmat Ground shipping	$50.00+
Inaccessible (Haz class 6.1 or 9), Domestic	$68.00+
Accessible (Haz class 3, 4, 5 or 8), Domestic	$158.00+
Inaccessible (Haz class 6.1 or 9), International	$108.00+
Accessible (Haz class 3, 4, 5 or 8), International	$238.00+

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5-Chloropyrazolo[1,5-a]pyrimidin-3-amine|CS-0050512

Structure of 1234616-50-2

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General Information

CAS No. 1234616-50-2
Cat. No. CS-0050512
Purity ≥96%
MDL No. None
Storage 4°C, protect from light, stored under nitrogen
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₆H₅ClN₄
Molecular Weight 168.58
Synonym(s) 3-amino-5-chloropyrazolo[1,5-a]pyrimidine
SMILES NC1=C2N=C(Cl)C=CN2N=C1

Description

5-Chloropyrazolo[1,5-a]pyrimidin-3-amine features a fused heterocyclic core with a chloro substituent at the 5-position and an amine group at the 3-position. This arrangement imparts enhanced electronic density and directional reactivity, enabling efficient coupling in medicinal chemistry applications. The scaffold exhibits robust stability under standard conditions, facilitating incorporation into diverse molecular architectures for targeted drug discovery.

Application

5-Chloropyrazolo[1,5-a]pyrimidin-3-amine serves as a versatile heterocyclic building block for medicinal chemistry and agrochemical research. Its chloro group enables palladium-catalyzed cross-coupling reactions, while the primary amine facilitates derivatization via acylation, alkylation, or amidation. The scaffold exhibits good bench stability and compatibility with common protecting group strategies, making it well-suited for modular synthesis of functionalized pyrazolopyrimidine derivatives.

Safety Information

Download SDS

GHS Pictogram :	GHS No : GHS07
Signal Word : Warning	UN#: N/A
Class : N/A	Packing Group : N/A
Hazard Statements : H302
Precautionary Statements : P261-P280-P304+P340

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Computational Chemistry Data

TPSA 56.21
LogP 0.9649
H_Acceptors 4
H_Donors 1
Rotatable_Bonds 0

Other Classifications

Building Blocks Functional Group Chloride

Building Blocks Skeleton Aromatic heterocycle compounds Pyrazole compounds

Building Blocks Skeleton Aromatic heterocycle compounds Pyrimidine compounds

Key Words

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5-Chloropyrazolo[1,5-a]pyrimidin-3-amine

CAS No. 1234616-50-2

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